Finasteride 1mg, commonly known by the brand name Propecia, is a medication primarily used for the treatment of male pattern hair loss (androgenetic alopecia) in men. It works by reducing the levels of dihydrotestosterone (DHT), a hormone that plays a key role in the miniaturization of hair follicles and subsequent hair loss. Finasteride is classified as a 5-alpha reductase inhibitor. It is taken orally, typically once daily. While it can effectively slow down hair loss and even promote new hair growth in some men, its effects are generally sustained only as long as the medication is taken. Upon discontinuation, hair loss often resumes within several months.
Deep dive
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Known interactions
Category rule: supplement × medication
Note
Some supplements change how the body processes medications (absorption, liver enzymes, or additive effects).
Specific pairs are checked against a licensed drug database and shown with their own severity. Always confirm with your provider or pharmacist.
Category rule: vitamin × medication
Note
Certain vitamins interact with specific medications (e.g., vitamin K with blood thinners).
Specific pairs are checked against a licensed source; confirm with your provider.
Compound-pair rule
Caution
5-alpha-reductase inhibitors block DHT conversion; can affect libido and prostate response on TRT.
Discuss goals with prescribing clinician; monitor sexual function.
Frequently asked
Sources referenced
["U.S. National Library of Medicine, MedlinePlus", "U.S. Food and Drug Administration (FDA) label for Propecia", "National Institutes of Health (NIH) Office of Dietary Supplements (ODS)", "Mayo Clinic", "DrugBank"]
Stackwise compiles summaries from publicly available scientific and regulatory references. Always verify important decisions with a licensed clinician.
Related compounds
Others in the medication category or studied for the same goals.
